Improvement in coffee-roasters



N'. DAVIS.

Coffee Roaster.

Patented Dec. 13, 1870.

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NOAH DAVIS, orBoSToN, MASSACHUSETTS.'

Letters Patent No. 110,017, dated December 13, 1870.

IMPROVE-ME-NT IN COFFEE-ROASTERS.

The Schedule-referred to in these Letters Patentand making part ofthesame.

.To all persons to whom these. presents may come:

Be it'known that I, NOAH DAVIS, oi'Boston, of' the county of Suffolk andState of Massachusetts, have ,in-

vented a new and useful Improvement in Coffee- Roasters and do herebydeclare the saine to be fully described in' the following specificationand represented in the accompanying drawing, of' which- Figure l is alongitudinal section f Figure 2, an end view; and A Figure 3, atransverse section of a coffee-roaster or roastingdrumas made inaccordance with my invenflhe periphery ofthe said drum is composed of acylindrical casing, Gr, or series of elongated metallic boxes orchambers- A, anda series of plates yor thin bars, B, ofsteatite,arranged in manner as represented, and with their ends against twocircular metallic heads G C.

Eachof the platesoi' bars of steatte is held in place between the twonext adjacent boxes A by -tlangesa a, arranged on thelatter, as shown,and there is an opening, D, on the side of' the drum, to be providedwith a closing slide or door, E. Y

Each chamber' A hasits inner plate made fora-minous, or .pnnetnred .withaseries ofsmall holes, b. i

The said chamber also has a hole, c, made in one or in each end of it,at or near one corner of the chamber.

The metal of which the article is to be made shonld be iron, `and itshould be plated on its interior surface with silver,`as shown at s, inorder to protect it from oxidation by the acid developed during theroasting of' coffee. y

' The drum somade is provided with a shaft, F, whose journals areexhibited at dd. NVithin the interior of' the drum-are deflecting-platesc e and j f, arranged as represented, the two e e being disposed at anacute angle with each other'` and placed at the middle of the'drmn andagainst its inner peliphei'y. v g v rlhe other two plates orwings, ff,extend-inward from the ends ofthedrum and neaiits inner periphery.

While the drum may be in` revolution, the defiect- I ing-plates e e'willspread the coffee laterally toward the ends of the drum, after whichit-will be moved inward toward the middle ofthe drum by the wings` ff.Thus, while thedrum may be in operation the coliee will bemovedlaterally back and forth, and raised and turned over, so as tobring every kernel of it into contact withthe roasting surfaces.

'The hollow boxes A become so many receivers of the vapors dischargedfrom the coffee whilek it may be in the act of' being roasted, suchvapors escaping'hy the holes at the ends of' such receivers.

Most, if' not all, the oil of the coffee will remain in expand Withoutdanger of breakage. i

1 claim as my invention in the above-,described coffee-roaster asfollows:

1. Thearrangement'and combination of the sefrit-zsl of foraminousvapor-receiving and eduction-chamhel'sr A with the outer casing G andheads OO of the drum.f

2. The combination 'and arrangement of the series of ste'atite plates orhars B with the series o? foramnou's vapor-receiving andeduction-chambers A, the outer casing G, and heads C 0 ofthe drums, allbeing substantially as described. A f

3. The combination and arrangement ofthe iianges a with the series ofvapor-receiving and ednction vchambers A, the outer casing G, and heads',(J` C of the drum, as set forth.

4. lhearrangement and combination of the deflecting-plates e and therings ff with the coffee-.roasting drum. l

5. A-coffee-roasting drnm, as made of iron, coated with a plating of'silver arranged on its inner surface,

-or such-part or parts thereof' as, while the drum may.

be in use, may be exposed to the acid evolved from the coffee.

NOAH DAVIS. Witnesses:

R. H. EDDY, J. R. SNOW.

